Open Ended Bank Guarantee Template for England and Wales

An open ended bank guarantee is a financial security instrument that gives indefinite protection for your commercial transactions under the law of England and Wales. Unlike a guarantee with a fixed end date, it continues until you or the guarantor bank explicitly releases or cancels it, which suits long-term business relationships that need sustained financial assurance.

What is an open ended bank guarantee?

It is a written undertaking, usually issued as a guarantee letter, in which a bank agrees to pay a beneficiary a defined sum on demand. The distinguishing feature is that there is no stated end point. Where an ordinary bond or guarantee lapses automatically on a set date, an open ended guarantee remains live until it is formally cancelled. Payment is typically made in cash from the bank's own funds against a valid demand, and the bank later recovers that amount from the applicant's account under the counter-indemnity it holds. Some banks offer this as an online service, so the applicant can request the guarantee and track its status directly through their business banking portal.

When do you need this document?

An open ended bank guarantee suits long-term commercial arrangements where continuing financial security matters. This includes infrastructure and construction projects that run across several years, property lease agreements with indefinite terms, and continuous trading relationships with suppliers or contractors. It is particularly useful when you cannot predict how long your financial exposure will last, or when the relationship may extend beyond a typical guarantee period. In trade finance it can support ongoing supply arrangements where a one-off letter of credit tied to a single shipment would be too narrow. Many landlords and project owners request an open ended guarantee to cover obligations that may arise throughout an extended relationship. For fixed-scope arrangements you might instead use a on-demand bank guarantee or a performance bond guarantee.

Open ended guarantee vs letter of credit

Both are undertakings from an issuing bank, but they serve different purposes. A letter of credit is a payment mechanism, usually settled against shipping and trade documents for a specific transaction. An open ended guarantee is a security instrument that pays only if the applicant defaults, and it has no fixed end point.

What should the guarantee letter contain?

The guarantee and indemnity clause sits at the core of the document, setting out the bank's unconditional obligation to pay against a valid demand. Draft the demand mechanics carefully so the letter is precise about how and when a claim can be made:

• The maximum sum payable and the currency.
• The documents a beneficiary must present with a demand.
• The notice period and the contact and account details the demand should be sent to.
• Any collateral, security or margin the bank holds against the applicant, and how it applies to a loan or facility the applicant already has.
• Whether fees or interest accrue on amounts the bank pays out before it recovers from the applicant.
• How the parties are to inform each other of a change of address or bank.
• Release and cancellation terms, so the guarantee can be closed cleanly once the underlying obligations end.

Because there is no built-in end point, consider adding a reduction clause or a periodic review so exposure does not run unchecked. It is also worth addressing how the guarantee interacts with the underlying contract, including any limitation periods, and how the personal or business data exchanged when a demand is made is handled in line with the bank's privacy terms.

Open ended guarantee vs fixed-term guarantee

Why is an open ended guarantee sometimes criticised?

An open ended guarantee is sometimes criticised because it leaves the applicant exposed for an uncertain period, ties up banking facilities and any collateral pledged against them, and can be difficult to cancel where the beneficiary is slow to confirm release. Some banks limit how many they will issue, and their own risk policy may require a defined review point or a reduction schedule. Setting out clear release conditions in the guarantee letter reduces these concerns.

Who can request an open ended bank guarantee?

A business applicant with an existing banking relationship can request an open ended bank guarantee directly from its bank, subject to a credit assessment and the security the bank requires. The beneficiary is the party who will be paid on a valid demand, whether that is a landlord, a public authority, a project owner or a supplier. The bank issues the guarantee to meet the commercial requirement the parties have agreed, and the applicant remains the party ultimately liable to reimburse the bank.

Governing law and jurisdiction

An open ended bank guarantee for use here should specify England and Wales as the governing law and jurisdiction, giving certainty on how the guarantee letter is interpreted and enforced. Banks issuing guarantees also work within UK financial services regulation and, for cross-border trade, may reference internationally recognised rules for demand guarantees. The applicable statutes and rules are set out in the applicable law section below.